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ZLDO1117 Document number: DS32018 Rev. 6 - 2
1 of 14 www.diodes.com
July 2012© Diodes Incorporated
ZLDO1117
A Product Line ofDiodes Incorporated
1A LOW DROPOUT POSITIVE REGULATOR 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V AND ADJUSTABLE OUTPUTS
Description ZLDO1117 is a low dropout positive adjustable or fixed-mode regulator with 1A output current capability.
The ZLDO1117 has a 2% tolerance across the industrial temperature range and is guaranteed to have lower than 1.2V dropout at full load current making it ideal to provide well-regulated outputs of 1.2V to 5.0V with input supply voltages up to 18V.
The ZLDO1117 is ideally suited to provide well-regulated supplies for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply across the whole industrial temperature range.
Features • 1.2V Maximum Dropout at Full Load Current • 2% Tolerance Over Temperature, Line and Load Variations • Fast Transient Response • Output Current Limiting • Built-in Thermal Shutdown • Good Noise Rejection • Suitable for use with MLCC Capacitors • Qualified to AEC-Q100 Grade 2 (see ‘Ordering Information’) • PPAP capable (Note 4) • -40 to +125°C Junction Temperature Range • Available in TO252 and SOT223 with “Green” Molding Compound
(No Br, Sb) Lead-Free Finish; RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
SOT223
TO252
1
2
3
Adj (GND)
Vout
Vin
Tab is Vout
(Top View)
Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied. 2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally the same, except where specified.
Typical Applications Circuit
1A I/O – 1.8V Core Regulator
3.3V
4.7µF MLCC
ZLDO1117-18 1.8V
4.7µF MLCC
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Pin Descriptions
Pin Name I/O Pin
Number Function
Adj (GND) I 1 A resistor divider from this pin to the VOUT pin and ground sets the output voltage (Ground only for Fixed-Mode).
VOUT O 2 The output of the regulator. A minimum of 4.7µF capacitor (0.05Ω ≤ ESR ≤ 0.5Ω) must be connected from this pin to ground to insure stability. For improved ac load response a larger output capacitor is recommended.
VIN I 3
The input pin of regulator. Typically a large storage capacitor (0.05Ω ≤ ESR ≤ 0.5Ω) is connected from this pin to ground to ensure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be 1.3V higher than VOUT in order for the device to regulate properly.
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.)
Symbol Parameter Rating UnitVIN Input Supply Voltage (Relative to Ground) -0.03 to +18 V TJ Junction Temperature +150 °C Power Dissipation See SOA Curve
TST Storage Temperature -65 to +150 °C
Unless otherwise stated voltages specified are relative to the ANODE pin.
Safe Operation Area (SOA) Curve ESD Susceptibility
Symbol Parameter Rating UnitHBM Human Body Model 4 kV MM Machine Model 400 V
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting these devices
0
0.2
0.4
0.6
0.8
1
1.2
0 5 10 15 20 25VIN - VOUT (V)
I LOA
D (A
)
SOA
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Symbol Parameter Min Max Unit
VIN Input voltage 2.7 (Note 8) 18 V IO Output current 0.01 1 A TJ Operating Junction Temperature Range (Note 5) -40 +125 °C
Package Thermal Data
Thermal Resistance Package Rating Unit
Junction-to-Ambient, θJA SOT223 (Note 6) TO252 (Note 7)
107 73 °C/W
Junction-to-Case, θJC SOT223 (Note 6) TO252 (Note 7)
16 12 °C/W
Notes: 5. ZLDO1117 contains an internal thermal limiting circuit that is designed to protect the regulator in the event that the maximum junction temperature exceeded. When activated, typically at 150°C, the regulator Output switches off and then back on as the die cools.
6. Test condition for SOT223: TA = +27°C, no air flow, device mounted on 2”X2” polyimide PCB, 2 oz copper, 5.6mmX5.6mm pad. 7. Test condition for TO252: TA = +27°C, no air flow, device mounted on 2”X2” polyimide PCB, 1 oz copper, 2cmX2cm pad.
8. Ensures correct operation without entering dropout. Device will continue to operate below this minimum input voltage under dropout conditions. Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
Parameter Conditions TA Min Typ Max Unit
Reference Voltage ZLDO1117-ADJ (VIN-VOUT) = 2V, IO = 10mA 25 1.238 1.250 1.263
V VOUT+1.4V < VIN< 10V, 10mA < IO< 1A FT 1.225 1.275
Output Voltage
ZLDO1117-1.2 IO = 10mA, VIN = 3.2V 25 1.188 1.200 1.212 V 10mA< IO< 1A, 2.7V <VIN< 12V FT 1.176 1.224
ZLDO1117-1.5 IO = 10mA, VIN = 3.5V 25 1.485 1.500 1.515
V 0 < IO< 1A, 2.9V <VIN< 12V FT 1.470 1.530
ZLDO1117-1.8 IO = 10mA, VIN = 3.8V 25 1.782 1.800 1.818
V 0 < IO< 1A, 3.2V <VIN< 12V FT 1.764 1.836
ZLDO1117-2.5 IO = 10mA, VIN = 4.5V 25 2.475 2.500 2.525
V 0 < IO< 1A, 3.9V <VIN< 12V FT 2.450 2.550
ZLDO1117-3.3 IO = 10mA, VIN = 5.3V 25 3.267 3.300 3.333
V 0 < IO< 1A, 4.7V <VIN < 12V FT 3.235 3.365
ZLDO1117-5.0 IO = 10mA, VIN = 7V 25 4.95 5.000 5.05
V 0 < IO< 1A, 6.4V <VIN < 12V FT 4.900 5.100
Line Regulation
ZLDO1117-ADJ ZLDO1117-1.2
IO = 10mA, VOUT+1.5V<VIN<12V
25 0.1 %
FT 0.2
ZLDO1117-xx IO = 0mA, VOUT+1.5V<VIN<12V
25 0.1 %
FT 0.2
Notes: 9. See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18” from the package. 10. Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference between input and output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Electrical Characteristics (cont.) (@TA = +25°C, unless otherwise specified.)
Parameter Conditions TA Min Typ Max Unit
Load Regulation
ZLDO1117-ADJ VIN=3.3V,VADJ=0, 10mA<IO<1A, (Notes 9, 10)
25 0.2 %
FT 0.4
ZLDO1117-1.2 VIN=2.7V, 10mA < IO < 1A, (Notes 9, 10)
25 0.2 % FT 0.4
ZLDO1117-1.5 VIN = 3V, 0 < IO< 1A, (Notes 9, 10)
25 3 mV
FT 6
ZLDO1117-1.8 VIN = 3.3V, 0 < IO< 1A, (Notes 9, 10)
25 4 mV
FT 8
ZLDO1117-2.5 VIN = 4V, 0 < IO< 1A, (Notes 9, 10)
25 5 mV
FT 10
ZLDO1117-3.3 VIN = 4.8V, 0 < IO< 1A, (Notes 9, 10)
25 6.6 mV
FT 13
ZLDO1117-5.0 VIN = 6.5V, 0 < IO< 1A, (Notes 9, 10)
25 10 mV
FT 20
Dropout Voltage (VIN-VOUT)
ZLDO1117-ADJ/1.2/1.5/1.8/2.5/ 3.3/5.0
IO = 1A, ΔVOUT = 1%VOUT 25 1.11 1.2
V 0 ~ 125 1.3 FT 1.35
Current Limit ZLDO1117-ADJ/1.2/1.5/1.8/2.5/ 3.3/5.0
(VIN-VOUT) = 5V 25
A FT 1. 1
Minimum Load Current (Note 8)
ZLDO1117-ADJ ZLDO1117-1.2 VIN = <18V FT 2 5 mA
Quiescent current ZLDO1117-xx VIN< 18V, IO = 0mA FT 4 10 mA
GND current ZLDO1117-ADJ ZLDO1117-1.2 VIN = 7V FT 35 120 µA
Thermal Regulation 30ms pulse 25 0.1 %/W
Ripple Rejection f = 120Hz, COUT = 25µF Tantalum, IOUT = 100mA, ZLDO1117-XXX VIN = VOUT+3V 25 60 80 dB
Temperature Stability IO = 10mA 0.5 %
Notes: 8. See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junctiontemperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18” from the package. 9. Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference between input and output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Typical Characteristics
Output Voltage Variation vs. Temperature Line Regulation vs. Temperature
Load Regulation vs. Temperature Drop-Out Voltage vs. Current
Drop-Out Voltage vs. Temperature Adjust Pin Input Current
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-40 -25 -10 5 20 35 50 65 80 95 110 125
Temperature (°C)
∆Vou
t (%
)
Adjustable versionILOAD = 10mA
-0.01
0
0.01
0.02
0.03
0.04
0.05
0.06
-50 -25 0 25 50 75 100 125Temperature (C)
Line
Reg
ulat
ion
(%) VOUT+1.5V<VIN<12V, IOUT=10mA
0
0.05
0.1
0.15
0.2
0.25
-50 -25 0 25 50 75 100 125Temperature (°C)
Load
Reg
ulat
ion
(%)
VIN=3.3V, 10mA<IOUT<1A
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
0 0.2 0.4 0.6 0.8 1IOUT (A)
Dro
pout
vol
tage
(V)
TJ = 25ºC∆VOUT = 1% of VOUT
Dropout vs Temperature
0.8
0.9
1
1.1
1.2
1.3
1.4
-50 -25 0 25 50 75 100 125Temperature (°C)
Dro
pout
(V)
IOUT=1A∆VOUT = 1% of VOUT
0
10
20
30
40
50
60
70
-50 -25 0 25 50 75 100 125Temperature (°C)
I AD
J (µA
)
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Typical Characteristics
Transient Load Regulation with 10µF Tantalum
Capacitor Transient Load Regulation with 4.7µF MLCC Capacitor
Transient Line Regulation with 4.7µF MLCC Capacitor
Ripple Rejection
ILOAD = 100mA, VIN - VOUT = 3V
50
55
60
65
70
75
80
85
90
10 100 1,000 10,000 100,000Frequency (Hz)
Rip
ple
Rej
ectio
n (d
B)
4V
5V
0
10
10µs/div
ZLDO1117 2.5V CIN = 1µF, COUT = 4.7µF MLCCILOAD = 100mA
100mA
ZLDO1117-2.5V CIN = 1µF, COUT = 10µFTANT IPRELOAD = 100mA, Istep = 500mA
600mA
0
10mV
-10mV
100mA
ZLDO1117-2.5V CIN = 1µF, COUT = 4.7µF MLCC IPRELOAD = 100mA, ISTEP = 500mA
600mA
0
10mV
-10mV
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Application Information The ZLDO1117 family of quasi-LDO regulators is easy to use. They are protected against short circuit and thermal overloads. (see block diagram).
Thermal protection circuitry will shut down the regulator should the junction temperature exceed +150°C at the sense point. The ZLDO1117 is pin compatible with similar ‘1117 regulators and offers extended temperature range and improved regulation specifications. Operation The ZLDO1117 develops a 1.25V reference voltage between the output and the adjust terminal (see block diagram). By placing a resistor between these two terminals, a constant current is caused to flow through R1 and down through R2. For fixed output variants Resistors R1 and R2 are internal. Stability The ZLDO1117 requires an output capacitor as part of the device frequency compensation. As part of its improved performance over industry standard 1117 the ZLDO1117 is suitable for use with MLCC (Multi Layer Ceramic Chip) capacitors. A minimum of 4.7µF ceramic X7R, 4.7µF tantalum, or 47 µF of aluminum electrolytic is required. The ESR of the output capacitor should be less than 0.5Ω. Surface mount tantalum capacitors, which have very low ESR, are available from several manufacturers. When using MLCC capacitors avoid the use of Y5V dielectrics. Load Regulation For improved load regulation the ZLDO1117-ADJ should have the upper feedback resistor, R1, connected as close as possible to VOUT and the lower resistor, R2, connected as close as possible to the load GND return. This helps reduce any parasitic resistance in series with the load. Thermal Considerations ZLDO1117 series regulators have internal thermal limiting circuitry designed to protect the device during overload conditions. For continuous normal load conditions however, the maximum junction temperature rating of +125°C must not be exceeded.
It is important to give careful consideration to all sources of thermal resistance from junction to ambient. For the SOT223-3L and TO252-3L packages, which are designed to be surface mounted, additional heat sources mounted near the device must also be considered. Heat sinking is accomplished using the heat spreading capability of the PCB and its copper traces. The θJC (junction to tab)of the TO252-3L and SOT223-3L are +12°C/W and +16°C/W respectively.
Thermal resistances from tab to ambient can be as low as +30°C/W. The total thermal resistance from junction to ambient can be as low as +42 to +46°C/W. This requires a reasonable sized PCB with at least one layer of copper to spread the heat across the board and couple it into the surrounding air. Datasheet specifications using 2 oz copper and a 5mmx5mm pad with TA = +27°C, no air flow yielded θJA (junction to tab) of +73°C/W and +107°C/W for TO252-3L and SOT223-3L respectively.
The thermal resistance for each application will be affected by thermal interactions with other components on the board. Some experimentation will be necessary to determine the actual value. Ripple Rejection When using the ZLDO1117 adjustable device the adjust terminal can be bypassed to improve ripple rejection. When the adjust terminal is bypassed the required value of the output capacitor increases.
The device will require an output capacitor of 22µF tantalum or 150µF aluminum electrolytic when the adjust pin is bypassed. Normally, capacitor values on the order of 100µF are used in the output of many regulators to ensure good load transient response with large load current changes. Output capacitance can be increased without limit and larger values of output capacitance further improve stability and transient response.
The curves for Ripple Rejection were generated using an adjustable device with the adjust pin bypassed. These curves will hold true for all values of output voltage. For proper bypassing, and ripple rejection approaching the values shown, the impedance of the adjust pin capacitor, at the ripple frequency, should be < R1. R1 is normally in the range of 100Ω to 200Ω. The size of the required adjust pin capacitor is a function of the input ripple frequency. At 120Hz, with R1 = 100Ω, the adjust pin capacitor should be >13µF. At 10kHz only 0.16µF is needed.
For fixed voltage devices, and adjustable devices without an adjust pin capacitor, the output ripple will increase as the ratio of the output voltage to the reference voltage (VOUT/VREF). For example, with the output voltage equal to 5V, the output ripple will be increased by the ratio of 5V/1.25V. It will increase by a factor of four. Ripple rejection will be degraded by 12dB from the value shown on the curve.
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Typical Application Circuits
Figure 1 Basic Adjustable Regulator with 5V Output
Using
⎩⎨⎧
⎭⎬⎫+•=
1R2R125.1VOUT
then the output voltage becomes:
V0.5110330125.1VOUT =
⎩⎨⎧
⎭⎬⎫+•=
Figure 2 Adjustable Regulator with IADJ Errors
2RI1R2R125.1V ADJOUT •+
⎩⎨⎧
⎭⎬⎫+•=
Because IADJ typically is 55μA, its effect is negligible in most applications.
V02.53301055110330125.1V 6
OUT =⎩⎨⎧
⎭⎬⎫••++•= − ~ 0.4%
A. Output capacitor selection is critical for regulator stability. Larger Cout values benefit the regulator by improving transient response and loop
stability. B. CADJ can be used to improve ripple rejection. If CADJ is used, a Cout that is larger in value than CADJ must be used. C. Cin is recommended if ZLDO1117 is not located near the power supply filter. D. An external diode is recommended to protect the regulator if the input instantaneously is shorted to GND. E. This device is designed to be stable with tantalum and MLCC capacitors with an ESR less than 0.47Ω.
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Other Application Circuits
Figure 3 ZLDO1117 with Extended Output Voltage
C2100 F10 F
ZLDO1117IN OUT
ADJC1
R2
R1121Ω
365Ω
VIN
TTL
R4R31k 1k
1%
1%
T1MMBT3904
VOUT
Figure 4 ZLDO1117 with Disable Function
ZLDO1117x50IN OUT
ADJ
10 FC1 C2
100 F
VOUT = -5V
AC IN
Figure 5 ZLDO1117 as a Negative LDO
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Ordering Information
Part Number Output Voltage Packaging (Note 11) Status Reel Quantity Tape width Reel size
ZLDO1117KTC Adjustable
TO252 Active 2500 16 mm 13”
ZLDO1117GTA SOT223 Active 1000 12 mm 7”
ZLDO1117K12TC 1.2V
TO252 Active 2500 16 mm 13”
ZLDO1117G12TA SOT223 Active 1000 12 mm 7”
ZLDO1117K15TC 1.5V
TO252 Active 2500 16 mm 13”
ZLDO1117G15TA SOT223 Active 1000 12 mm 7”
ZLDO1117K18TC 1.8V
TO252 Active 2500 16 mm 13”
ZLDO1117G18TA SOT223 Active 1000 12 mm 7”
ZLDO1117K25TC 2.5V
TO252 Active 2500 16 mm 13”
ZLDO1117G25TA SOT223 Active 1000 12 mm 7”
ZLDO1117K33TC 3.3V
TO252 Active 2500 16 mm 13”
ZLDO1117G33TA SOT223 Active 1000 12 mm 7”
ZLDO1117K50TC 5.0V
TO252 Active 2500 16 mm 13”
ZLDO1117G50TA SOT223 Active 1000 12 mm 7”
ZLDO1117QKTC Adjustable
TO252 Active 2500 16 mm 13”
ZLDO1117QGTA SOT223 Active 1000 12 mm 7”
ZLDO1117QK12TC 1.2V
TO252 Active 2500 16 mm 13”
ZLDO1117QG12TA SOT223 Active 1000 12 mm 7”
ZLDO1117QK15TC 1.5V
TO252 Active 2500 16 mm 13”
ZLDO1117QG15TA SOT223 Active 1000 12 mm 7”
ZLDO1117QK18TC 1.8V
TO252 Active 2500 16 mm 13”
ZLDO1117QG18TA SOT223 Active 1000 12 mm 7”
ZLDO1117QK25TC 2.5V
TO252 Active 2500 16 mm 13”
ZLDO1117QG25TA SOT223 Active 1000 12 mm 7”
ZLDO1117QK33TC 3.3V
TO252 Active 2500 16 mm 13”
ZLDO1117QG33TA SOT223 Active 1000 12 mm 7”
ZLDO1117QK50TC 5.0V
TO252 Active 2500 16 mm 13”
ZLDO1117QG50TA SOT223 Active 1000 12 mm 7”
Note: 11. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
ZLDO1117 Document number
Marking In
TO252
SOT223
r: DS32018 Rev. 6
nformation
- 2
n
w11 of 14
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m
DA Product
Diodes Incor
ZL
t Line ofrporated
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LDO1117
2ed
ZLDO1117 Document number: DS32018 Rev. 6 - 2
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Package Outline Dimensions (All dimensions in mm.) SOT223
TO252
SOT223 Dim Min Max Typ
A 1.55 1.65 1.60 A1 0.010 0.15 0.05 b1 2.90 3.10 3.00 b2 0.60 0.80 0.70 C 0.20 0.30 0.25 D 6.45 6.55 6.50 E 3.45 3.55 3.50
E1 6.90 7.10 7.00 e — — 4.60
e1 — — 2.30 L 0.85 1.05 0.95 Q 0.84 0.94 0.89 All Dimensions in mm
TO252 Dim Min Max Typ
A 2.19 2.39 2.29A1 0.00 0.13 0.08A2 0.97 1.17 1.07b 0.64 0.88 0.783
b2 0.76 1.14 0.95b3 5.21 5.46 5.33c2 0.45 0.58 0.531D 6.00 6.20 6.10
D1 5.21 − −e − − 2.286E 6.45 6.70 6.58
E1 4.32 − − H 9.40 10.41 9.91L 1.40 1.78 1.59
L3 0.88 1.27 1.08L4 0.64 1.02 0.83a 0° 10° − All Dimensions in mm
A1
A
b3
E
2X b2
D
L4
Ac2
e
A1
L
L3
3X b a
H
A2 E1
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Suggested Pad Layout SOT223 TO252
Dimensions Value (in mm) X1 3.3 X2 1.2 Y1 1.6 Y2 1.6 C1 6.4 C2 2.3
Dimensions Value (in mm) Z 11.6
X1 1.5 X2 7.0 Y1 2.5 Y2 7.0 C 6.9 E1 2.3
X2
C1
C2
X1
Y2
Y1
X2
CZ
X1
Y1
E1
Y2
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LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2012, Diodes Incorporated www.diodes.com